L'RUCIFER.E. 151 



Plate 64. 

 SISYMBRIUM, L., R. Br. 



Siliqua haud stipitata, hexagono-teretiuscula vel compres- 

 so-teretiuscula, valvis convexis, 1 - 3-nerviis. Cotyledones 

 lineari-oblongas, planae, incumbentes. — Calyx laxus. Flores 

 albi, interdum flavi. 



Sisymbrium, Linn. Gen. 813. Allioni, Fl. Piedm. 1. p. 274. R. Br. in 

 Ait. Kew. 1. c. C. A. Meyer, in Ledeb. Fl. Alt. 3. p. 122. 

 Torr. & Gray, Fl. N. Am. 1. p. 91. Endl. Gen. 4'JOG. 



Erysimum, Tourn. Inst. p. 228. t. 111. non Linn. 



Hedge-Mustard. 



Calyx loosely erect ; the sepals equal at the base. Pe- 

 tals obovate or oblong, more or less unguiculate. Fila- 

 ments filiform or subulate-setaceous, toothless : anthers 

 oblong or oval. Glands various. Ovary sessile on the 

 receptacle, oblong or linear : style usually very short or 

 none : stigma subcapitate, mostly undivided. Ovules nu- 

 merous in one or two rows in each cell. 



Silio.uk not stipitate, cylindrical or tapering-subulate, 

 linear, or rarely oblong, mostly elongated, obscurely six- 

 sided, the convex valves being marked with three nerves, 

 or rarely somewhat four-sided, the lateral nerves being in- 

 conspicuous or obsolete, sometimes more flattened, two- 

 celled ; the partitions 1 - 2-nerved in the middle, or nerve- 

 less ; the areolae of various forms (in S. canescens nearly as 

 in Barbarea, Plate 62, fig. 9, but the lines more descending 

 and scarcely tortuous). Seeds numerous, pendulous on fili- 

 form free funiculi, in one row, or irregularly in two rows 

 in each cell, oblong, not margined, smooth. Cotyledons 

 linear-oblong, plane, parallel with the placentas, incumbent 

 (sometimes obliquely) on the outer side of the ascending 

 radicle. 



Herbs, either smooth, or with simple or branched pubes- 



